package com.dementors.widget;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 * Author  : itxuye(itxuye@gmail.com)|(http://itxuye.com)
 * Date    : 2015-12-06
 * Time    : 15:15
 * FIXME
 */
public class CircleImageView extends ImageView {

  /**
   * 自定义的圆形ImageView，可以直接当组件在布局中使用。
   *
   * 不适合高清图片，慎用 ，下周研究高清图片
   */

  private Paint paint;

  public CircleImageView(Context context) {
    this(context, null);
  }

  public CircleImageView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    paint = new Paint();
  }

  /**
   * 绘制圆形图片
   *
   * @author itxuye
   */
  @Override protected void onDraw(Canvas canvas) {

    Drawable drawable = getDrawable();
    if (null != drawable) {
      Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
      Bitmap b = getCircleBitmap(bitmap, 14);
      final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());
      final Rect rectDest = new Rect(0, 0, getWidth(), getHeight());
      paint.reset();
      canvas.drawBitmap(b, rectSrc, rectDest, paint);
    } else {
      super.onDraw(canvas);
    }
  }

  /**
   * 获取圆形图片方法
   *
   * @return Bitmap
   * @author itxuye
   */
  private Bitmap getCircleBitmap(Bitmap bitmap, int pixels) {
    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
        Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xff424242;

    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    int x = bitmap.getWidth();

    canvas.drawCircle(x / 2, x / 2, x / 2, paint);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);
    return output;
  }
}

